Injection valve for a diesel engine



H. W. DAIN May 9, 1933.

INJECTION VALVE FOR A DIESEL ENGINE Filed May 27, 1931 gwuentoa,

Elam 40,1

Patented May 9, 1933 PATENT oFFicE HARRINGTON WEBB DAIN, OF DONNA, TEXASINJECTION VALVE FOR A DIESEL ENGINE Application filed May 27,

This invention relates to intermittent injection valves, and especiallyto an injection valve for a Diesel engine.

One object of this invention is to provide an exceedingly eflicientfuel-injecting valve formed of the fewest initially separate parts so asto be produced and maintained at the lewest possible cost.

Another object is to provide a novel and 1 iniproved valve including amanually adj ustle valve-closure or port closure and fluidflow regulatorwhereby the duration of flow for each revolution of the .rotor can belengthened and shortened at will of the operator of the engine to whichit is attachable,

or of which itis a part.

Other objects and important features are pointed out or implied in thefollowing details of description in connection with the accompanyingdrawing in which:

Fig. 1 is a view mainly in section, the section being taken in the planeof the axis of the rotor.

Fig. 2 is a view mainly in section, the sec tion being taken along theline 2-2 of Fig. 1, and viewed in the direction of the arrow.

Fig. 3 is a view of the parts under the lines 33 of Figs. 1 and 2,showing the manually operable valve in the seat and guideway in which itis slidable.

Referring to this drawing in detail, in

which similar numerals refer to similar parts in the several views, theinvention is described in detail as follows:

The rotor, according to this form of the invention, is formed integrallyby turning it from a single piece of metal, on a turning lathe, so as to'form a cylindrical disc-like part 5, stub axles 6 and 7, and agear-member which has teeth out thereon for forming a gear-wheel 8 onthe axle 7, this axle also having a peripheral ridge 9 thereon. Thecylinder 5 is radially bored from a point in its pcriphery to the baseof the stub axle 6, and the latter is axially bored to meet the radialbore and thus to form a liquid fuel passage 10. The axial bore ispreferably (though not cssentia'lly) conical and inwardly tapered to,

closely fit around the conical end 11 of ambular fuel-feeding member 12which may be termediate parts of the members 13 and 14,

1931. Serial No. 540,487.

connected to any appropriate container (notshown) for supplying oil or,other fuel to the englne.

The valve-casing is preferably formed of four initially separate parts13, 14, 15 and 16. The parts 13 and 14 are complemental, each being aninverse duplicate of the other, and each is substantiallysemi-cylindrical and provided with means to secure it to the other, forinstance, apertured ears 17 and screwthreaded fasteners 18. The member16 is a hollow right circular cylinder which fits tightly within thehollow right circular cylinder formed by the parts 13 and let when thefasteners 18 are tightened, but which is adjustable around its axis whenthe fasteners are loosened, so as to' angularly adjust its peripherallyextending slot 19 for the desired cooperation with the slidablevalve-closure 20. Each member 13 and 14 is formed with axially parallelarcuate flanges 13a and 13?), 14a and 141), respectively. These flangesare formed with threaded apertures to receive screws 21 for securing themember 15 in place. This member 15 constitutes a combinedattaching unitfor securing the device to a cylinder of a Diesel engine, a cover forthe valve-seat formed by the flanges and inand a spraying nozzle fordividing the fluidfuel into small jets as it enters the enginecylinder.The spraying nozzle 15a is preferably screw-threaded for engagement withan internally threaded opening int-he enginecylinde'r (not shown) Thevalve-closure 20 is provided with a triangular opening 20a which ismoved into and out of communication with the slot 19 and passage 10 bymeans of a rod 20?) which is' united with the arcuate plate orvalve-closure 20 and extends out through complemental grooves betweenthe flanges 13d and 140, or 137) and-147). This rod 20!) can be movedinward and outward manually and can be held in different adjustedpositions by any appropriate means (not shown). The flanges of themembers 13 and 14 are formed with parallel walls and 140 which serve astracks or a guideway against which the straight edges of the valvemember 20 slide when being adjusted.

In the drawing, the valve is shown in the closed relation, that is, theopening or triangular aperture 20a being out of communication of theslot 19, although the passage 10 is in open communication with theslot19. It should be understood that the opening 10 moves along the slot 19during every revolution of the rotor 5, and that this slot is filledwith the liquid fuel in consequence of pressure under which the fuelisfed through the nozzle member 12. However, the spraying nozzle 15areceives the liquid fuel only when the opening 20a is in communicationwith the slot 19, and then, the duration of feeding is regulated by theposition of the angular opening 20a over the slot 19, for it has theeffect of practically lengthening or shortening the effective portion ofthe slot. It should also be understood that the gear wheel 8 effectsrotation of the valve cylinder 5, receiving its motive power from anyappropriate transmission mechanism of the engine; and that the inventionis not limited to this specific means of rotating thevalve member 5.

Although, I have described this embodiment of my invention specifically,I do'not intend to limit my patent protection to these exact details ofconstruction and arrangement; for the invention is susceptible ofnumerous changes within the scope of the inventive ideas as implied andclaimed.

What I claim as my invention is:

1. In a valve, the combination of a casing I having outer and innerwalls, the outer wall having an outlet, the inner wall having an outlet,a rotor journaled in the casing and having a fluid-passage therethroughin such relatiori thatit moves into and out of communication with theoutlet of the inner wall each time the rotor revolves, means to.introduce fluid into said passage,iand a valve-closure adjustably seatedbetween the outlets of the inner and outer walls.

2. The structure defined by claim 1, said outer wall being formed with ajournal-bearing for said rotor, said rotor having a journal in saidjournal-bearing and provided with a driving gear-member on said journal,the receiving end of said passage being axially alined with saidjournal, and the fluid-introvalve-seat and guide-way between them andprovided with means to slide it along said

